German engineering firm Festo has created this flying manta ray. Dubbed the Air_ray, it’s a balloon made of an aluminum-vaporised “PET foil”. Inflated with helium, the Air_ray’s propulsion ...

The great thing about the Northrop flying wing is that it now flies ... she looked like nothing more than an airborne Manta, slack-chinned, glowering through the orifices where her engines ...